21178791

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{1013}}^1$

素因数の和:1143

約数の個数: 24

約数和(自身を含む): 32269536

約数和(自身を除く): 11090745

約数列:

[1, 3, 9, 23, 69, 101, 207, 303, 909, 1013, 2323, 3039, 6969, 9117, 20907, 23299, 69897, 102313, 209691, 306939, 920817, 2353199, 7059597, 21178791]

約数ペア:

[(1, 21178791), (3, 7059597), (9, 2353199), (23, 920817), (69, 306939), (101, 209691), (207, 102313), (303, 69897), (909, 23299), (1013, 20907), (2323, 9117), (3039, 6969)]